Accessories - Y-Pipes & Cover Plates

Bravo Anti-Cavitation Cap
Your Price:
$99.99

Bravo Anti-Cavitation Cap

221-2002

Bravo Anti-Cavitation Cap

A revolutionary solution to a long-standing issue facing many performance boaters with Bravo style drives. In our never-ending search for top speeds, we install shorty drives with high X dimensions trying to chase a big number. While these upgrades frequently increase top speeds, they commonly lead to frustrating challenges just trying to get the boat on plane. Top speed numbers are great, but struggling to get on plane without your family and friends having to huddle in the front cabin is just not fun.

Identifying the Issue

MDC’s Bravo Anti-Cavitation cap is a simple solution to a complicated problem. After researching the issue, with the help of one of our dedicated customers, we discovered that the propeller is cavitating because it is also drawing in air through its hub, and not just from the surface, as most would believe. When you hit the throttles to get on plane, a low-pressure area is generated by the propeller as it tries to push the boat forward. Being that water is about 800x denser than air it is easier to just pull air through the hub and from the surface than move the water. The direct result is cavitation. Having a high X dimension / shorty lower just exacerbates the issue by making it even easier for the propeller to pull air from the surface and increasing the air that was already being pulled in through the propeller hub.

The Solution

MDC’s Bravo Anti-Cavitation Cap blocks the source of the air that is being pulled through the propeller hub. Cleverly designed, and easily installed, the Cap fits over the thru-hull exhaust input for the drive. Obviously, this system will not work unless you have performance thru-transom exhaust, and no captain’s choice or thru prop. Installation is easy and does not require removal of the drive. The system has been tested on numerous boats that had issues coming on plane, and every one of them not only saw significant improvement, they no longer require any special efforts to get on plane. So, instead of swapping out your shorty and losing speed just to be able to get on plane with your family and friends onboard, just install the MDC Bravo Anti-Cavitation Cap and go boating.


Extended Oval Hose for Y-Pipes for Silent Choice Use
Your Price:
$72.99

Extended Oval Hose for Y-Pipes for Silent Choice Use

421-02-2242

Oval hose for y-pipe attachments. Measures 6 3/4" tall. Used with silent choice.

Y-Pipe Insert Caps
Your Price:
$115.99

Mercruiser Y-Pipe Insert Caps

410-280160

Mercruiser Y-Pipe Insert Caps

These caps are commonly used when switching to a thru-hull exhaust system when the y-pipe is no longer needed to route the exhaust. Instead of pulling the engine to remove the y-pipe you can now easily slip these in and clamp them down, easy as that. Oval Shaped for Mercruiser applications. Made of stainless steel these caps will be good for years to come. Sold in pairs.


Cover Plate - Alpha and Bravo Applications
Your Price:
$34.99

Cover Plate - Alpha and Bravo Applications

421-260

Y-Pipe E Cover Plate

This cover plate is used when you remove the Y-pipe assembly and need to cover the exhaust port that has been left exposed. These are stainless steel cover plates, not aluminum units. Designed to last a lifetime.


4” Lower Exhaust Bellow 32-14358
Your Price:
$36.99

4” Lower Exhaust Bellow 32-14358

700-89130

Exhaust Bellow Lower 4" replaces MerCruiser part # 32-14358

Fits 700-51140 or 700-51145. 4” Elbow to 4” Y-Pipe


Upper Exhaust Bellow 32-44348T
Your Price:
$39.99

Upper Exhaust Bellow 32-44348T

700-89120

4" Upper Exhaust Bellow (use with 1-piece Exhaust Elbow) replaces MerCruiser part # 32-44348T

4” Center Mounted Riser to 4” Elbow V6 & V8
Fits 700-51140 or 700-51145